title: Autism and pervasive developmental disorders.
mesh_terms: D001321:Autistic Disorder / Q000235:genetics / Q000523:psychology*; D002648:Child; D002659:Child Development Disorders, Pervasive / Q000175:diagnosis / Q000235:genetics / Q000523:psychology; D002675:Child, Preschool; D039721:Diagnostic and Statistical Manual of Mental Disorders; D006801:Humans; D007223:Infant